Owner's manual

Omron Touch-Screen Display

Optionally, press the Main Menu touch key to return to the Main Menu. (See also, Main Menu.)

Optionally, press Back to return to the previous screen, N Register Access.

Calibrating a Krohne flow meter

A Krohne flow meter is an analog device. Calibration is very similar to the 220B with Analog

Transmitter (Model 310), except that the Krohne meter has a different table to use to determine the

maximum GPM @ 20 mA.

Krohne Meter

Size

(Inches)

Max

GPM

@ 20

1.5

135

240

550

970

2200

3900

6100

8800

12000

There are two ways to calibrate the flow, with or without a 4-20 ma signal generator. It is a lot easier

with the signal generator.

Calibration Procedure with a signal generator

1) With no flow, record the counts in raw data (:22) and enter that value in Min Raw (:62) and MinIn

(:72).

2) Remove the Krohne meter input wires at the PLC and connect your signal generator.

3) Generate a 20 mA signal.

4) Record the counts in raw data (:22) and enter that value in MaxIn (:82).

5) Disconnect the signal generator and reconnect the Krohne meter wiring.

6) Enter 0 in MinOut (:92).

7) Use the Krohne Meter Calibration chart above. Select the correct Krohne Meter size. Go to the

Max GPM @ 20 mA column and record that number in MaxOut

(:102).